Heretic Knife Colossus SE Breakthrough Purple Aluminum, Two Tone Black Battleworn MagnaCut by Tony Marfione Jr.
- Colossus Single Edge SE Breakthrough Purple Aluminum, Two Tone Black Battleworn. Automatic OTF knife operating in D/A (Double Action) mode with a slider to extend and retract the blade. Customised version by Anthony Marfione Jr., owner of Heretic Knives!

This product is intended for use only by adults with knowledge and experience in handling sharp cutting tools. Improper use of the knife can result in serious injuries. The blade is extremely sharp and can easily cut through skin and tissue; therefore, extra caution should always be exercised while cutting, and hands should be kept away from the cutting edge. To prevent the knife from slipping, it is recommended to cut on a stable, non-slip surface and avoid excessive force, which may cause uncontrolled blade movement.
Leaving the knife on the edge of a table, countertop, or in easily accessible places—especially where children are present—poses a significant safety risk. The knife should always be properly secured after use, ideally by placing it on a stable surface or storing it in designated knife blocks, protective sheaths, or magnetic strips. The knife should never be used for tasks it is not designed for, such as opening cans or prying objects, as this can damage the tool and lead to dangerous accidents.
A dull blade increases the risk of injury, as it requires more force and is more likely to slip from the material being cut. Therefore, it is essential to sharpen the knife regularly to maintain optimal sharpness. Additionally, proper cleaning and drying of the knife are necessary to prevent corrosion and bacterial growth. Periodic inspection of the handle and blade is recommended to check for cracks, chips, or looseness. If any damage is detected, the knife should be repaired or replaced immediately.
When using the knife, focus solely on the task at hand—avoid talking on the phone, watching television, or other distractions while cutting. Ensure proper lighting in the workspace for better visibility and control. Please note that some countries or regions have laws restricting the ownership and carrying of knives. Before purchasing or using this knife, verify that its use is legal in your location according to applicable regulations.
Following these safety guidelines will help ensure safe and effective knife use, minimizing the risk of accidents and extending the lifespan of the tool.
Colossus SE Breakthrough Purple Aluminum, Two Tone Black Battleworn has a secure place in the Heretic Knives OTF line of automatic knives. The mechanism, which operates with great strength and power, uses a patent-pending slide action. Ball bearings used reduce friction for fast, smooth blade locking. Grip enhancing inserts on both sides of the Handle give remarkable style as well as functionality. The double-sided clip makes this an ideal knife for right- or left-handed users.
CPM MagnaCut - Powdered stainless steel produced using the Crucible® Particle Metallurgy (CPM) process hardened to 60.5-62.5 HRC. The high content of vanadium 4.0% (V), molybdenum 2.0% (Mo) and niobium 2.0% (Nb) guarantees accuracy and purity unmatched by more 'conventional' steels. Designed and developed specifically for blade production by Larrin Thomas, it meets all the requirements of knife enthusiasts. With CPM, MagnaCut has managed to create a steel that combines unique properties like no other knife steel. The result is a blade material that offers an extraordinary balance of wear resistance, strength and corrosion resistance. There is currently no other steel on the world market that offers a comparable combination of excellent properties. This unique steel is produced in the US steel mills of Crucible® Industries.
Blade - Single Edge type finished in a striking Two Tone method, the bevels coated with black PVD, the rest satin-finished. Plain blade, derived with a high Flat Grind for excellent cutting properties. The short grain increases the strength of the blade. As a result, the knife has excellent piercing properties while retaining its strength. The mechanism of extending/retracting the blade by means of a mottled slider requiring, for safety, the application of a specific force to overcome the resistance of the spring. The opening method ensures trouble-free opening for both right- and left-handed people.
Handle - made on CNC milling machines with perfect precision, from purple anodised 6061-T6 aluminium with perfectly matching inserts. The material of the inserts resembles sandpaper in texture so that the knife does not slip in the hand during use. There are notches (jimping) on the Handle for a more secure grip. The slim design allows the knife to be stored in any pocket. The two-position clip (right/left), allows the knife to be carried in a tip-down position. The clip attachment includes a glass breaker.
Technical data:
Product number: H039-14A-BRKPU
Product name: Colossus Single Edge Breakthrough Purple Aluminum, Two Tone Black Battleworn, Black HW/Clip
Overall length: 217.0 mm / 8.53"
Blade length: 88.9 mm / 3.5"
Blade thickness: 3.5 mm / 0.14"
Handle length: 128.0 mm / 5.03"
Handle thickness: 12.4 mm / 0.49"
Weight: 133.0 g / 4.7 oz
Blade material: CPM MagnaCut
Blade hardness: n.d.
Blade grind: Flat
Blade finish: Battleworn Black
Handle material: 6061-T6 Aluminium with inlays
Handle finish color: Breakthrough Purple
Backspacer material: 6061-T6 Aluminium
Backspacer colour: Breakthrough Purple
Clip: Right / Left, Tip-down
Clip material: Stainless Steel
Pivot mechanism: n.d.
Locking mechanism: Slide Lock
Opening method: Automatic, Thumb Slide
Additional accessories: None
Designer: Tony Marfione Junior
Brand: Heretic Knives
Manufacturer: Heretic Knives
Country of origin: USA
Developed by: Sharg® company